CPS Sensor - Crankshaft Position Sensor

What does a Crankshaft Position Sensor or CPS do?

The Crankshaft Position Sensor or CPS determines which cylinder is firing to establish injector synchronization and proper engine operation. Your engine's Crankshaft Position Sensor sets the fuel injection timing, supply's the engine's RPM signal, and determines engine speed. The crankshaft position sensor is used in all modern engines with fuel injection systems as a triggering device for proper engine operation. Thus a malfunctioning Crankshaft Position Sensor can illuminate the check engine light or cause a no-start condition.

The warning signs of a crankshaft position failure:

• Irregular engine operation.
• Check Engine Light
• Excessive engine vibrations
• Poor acceleration
• Hesitation
• No start condition with a cold engine.
• Failure to start with a warm engine.
• Misfires
• Engine stalls
• Increased cycle time before the engine fires.

The most common issues associated with a faulty crankshaft position sensor are:

• Loose Connector Pins.
• Cracks in the Sensor Housing due to age and repeated heat cycles.
• Gaps between the reluctor wheel and the tip of the sensor.

The replacement of your faulty crank position sensor will allow your vehicle to operate as it is designed operating range with the proper fuel injection timing and maximum engine performance.